halftone line. round faded geometric pattern. black circle on white background for prints. screentone lines

abstract background black bullseye center centre centric circle circles circular concentric concept decoration design diffuse dot effect element epicenter fade faded geometric geometry gradation gradient graphic half halfton halftone halftones hypnosis hypnotic icon illusion illustration isolated line lines logo modern ornament patern paterns pattern patternes patterns prints radial ring ripple round screentone semitone shape sphere spiral texture tone tones vector vibration visual white Сircu